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Data representation


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Binary
What is the base 2 number system called?
Denary
What is the base 10 number system called?
Hexadecimal
What is the base 16 number system called?
On and off
In binary, what do 1 and 0 represent?
A single 0 or 1
What is a bit?
4 bits
How many bits are there in a nibble?
8 bits
How many bits are there in a byte?
1024
How many bytes are there in a kilobyte?
1024
How many kilobytes are there in a megabyte?
1024
How many megabytes are there in a gigabyte?
1024
How many gigabytes are there in a terrabyte?
10
1024 is 2 to the power of what?
1
What is 2^0?
2
What is 2^1?
4
What is 2^2?
8
What is 2^3?
16
What is 2^4?
32
What is 2^5?
64
What is 2^6?
128
What is 2^7
256
What is 2^8
255
What is the largest number that can be represented in a single byte?
Pixels
What are images made of?
The amount of red, green and blue in it
How can any colour be described?
3 bytes
In raw format, how much memory does each pixel use?
24 Mb
In raw format, how much memory does an 8 mega pixel image use?
American Standard Code for Information Interchange
What does ASCII stand for?
A standard way of converting from binary to letters or symbols
What is ASCII?
128
How many different symbols are there in ASCII?
4 bits
How much binary memory can be represented by one character of hexadecimal?